![background image](http://html1.mh-extra.com/html/stihl/e-140/e-140_service-manual_1378832006.webp)
The trigger switch (1) is equipped
with a mechanical starting lockout
(interlock button) which helps pre-
vent unintentional switch-on.
The saws feature a thermal over-
load circuit breaker (3) to protect
the electric motor from mechanical
overload.
This overload circuit breaker inter-
rupts the power supply to the saw
if the operator continues cutting for
an extended period with an over-
tensioned chain, uses excessive
feed force, "lugs down" the motor
speed or if the chain is suddenly
stopped by being pinched in the
cut.
Before restarting the saw and con-
tinuing work it is necessary to pull
the guide bar out of the cut and
wait for a short period until the
overload circuit breaker has coo-
led down. The overload circuit
breaker can then be reset by pres-
sing in the button as far as
the stop.
This is not a fault. The remedy in
such a case is to work with less
feed effort. Under no circumstan-
ces should the overload circuit
breaker be bypassed,
even if the
owner explicitly requests such a
modification
.
Chain brake
The brake lever is unlatched when
the "Quickstop" chain brake is
activated, either manually or by
inertia. The power supply is inter-
rupted immediately by the chain
brake switch (4) and the spring-loa-
ded brake band is clamped around
the brake drum at the same in-
stant.
This causes the saw chain to be
brought to a standstill and locked
in position. The chain brake is
disengaged by moving the hand
guard toward the front handle.
Coasting brake
The coasting brake supplements
the chain braking system. It brings
the rotating chain to a standstill
when the operator releases the
trigger switch.
In the idle condition, an additional
spring clamps the brake band aro-
und the brake drum.
When the trigger switch is squee-
zed, the brake band is first disen-
gaged from the brake drum via a
linkage. Only then does the switch
close and start the motor.
3.
WIRING DIAGRAM/DESCRIPTION
100RA002
2
3
2
1
2
1
1
2
K
1
2
3
4
5
6
5
7
VA
1
Trigger switch
2
Capacitor (230 V only)
3
Overload circuit breaker (E 160, E 180 C only)
4
Chain brake switch
5
Brush holder with carbon brush
6
Rotor
7
Stator
5